A294574 - OEIS

A294574

Numbers having exactly one representation as sum of squares of primes.

4, 8, 9, 12, 13, 16, 17, 18, 20, 21, 22, 24, 26, 27, 28, 30, 31, 32, 35, 39

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

OFFSET

1,1

LINKS

FORMULA

A090677(a(n)) = 1.

MATHEMATICA

Flatten[Position[Rest[CoefficientList[Series[Product[1/(1 - x^(Prime[k]^2)), {k, 1, 5}], {x, 0, 40}], x]], 1]]

CROSSREFS

KEYWORD

nonn,fini,full

AUTHOR

STATUS

approved