A176023 a(1) = 13, a(n) = square of sum of previous terms.

13, 169, 33124, 1109289636, 1230597389647535364, 1514369938137587812499677175361189636, 2293316309534841541915473293317407055631848366256764867236421660610435364

Offset

1,1

Comments

Sqrt(a(n+1)/a(n)) is an integer. Except first 3 terms, the terms alternately end in 36 and 64.

Links

Table of n, a(n) for n=1..7.

Crossrefs

Sequence in context: A228389 A020533 A176596 * A067220 A057684 A053153

Adjacent sequences: A176020 A176021 A176022 * A176024 A176025 A176026

Keyword

easy,nonn

Author

Giovanni Teofilatto, Apr 06 2010

Status

approved