A199399 - OEIS

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A199399

Binary XOR of 5^k as k varies from 0 to n.

1, 4, 29, 96, 529, 3620, 13101, 66048, 325601, 1653380, 9189501, 40187552, 216562929, 1143607140, 5098589837, 26660767488, 161932208321, 635945960964, 4313170161629, 20567937335008, 74804061006033, 551572049610276, 2689136522898669, 10088864973699328, 67578042506892449

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,2

LINKS

Table of n, a(n) for n=0..24.

EXAMPLE

a(2) = 1 XOR 5 = 4; a(3) = 1 XOR 5 XOR 25 = 29; a(4) = 1 XOR 5 XOR 25 XOR 125 = 96.

PROG

(PARI) {a(n)=if(n<0, 0, bitxor(a(n-1), 5^n))}

CROSSREFS

Cf. A199397.

Sequence in context: A192025 A288542 A024394 * A211545 A295842 A345897

Adjacent sequences: A199396 A199397 A199398 * A199400 A199401 A199402

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Nov 05 2011

STATUS

approved