A374927 a(n) = A135318(n)^2.

1, 1, 1, 4, 9, 16, 25, 64, 121, 256, 441, 1024, 1849, 4096, 7225, 16384, 29241, 65536, 116281, 262144, 466489, 1048576, 1863225, 4194304, 7458361, 16777216, 29822521, 67108864, 119311929, 268435456, 477204025, 1073741824, 1908903481, 4294967296, 7635439161

Offset

0,4

Comments

A374098 terms swapped by pairs.

Links

Table of n, a(n) for n=0..34.

Index entries for linear recurrences with constant coefficients, signature (0,3,0,6,0,-8).

Formula

a(2*n) = A139818(n+1).

a(2*n+1) = 4^n = A000302(n).

a(n) = 3*a(n-2) +6*a(n-4) -8*a(n-6).

Crossrefs

Cf. A000302, A112387, A135318, A139818, A374098.

Sequence in context: A115648 A082522 A279096 * A299153 A133900 A143480

Adjacent sequences: A374924 A374925 A374926 * A374928 A374929 A374930

Keyword

nonn,easy

Author

Paul Curtz, Jul 24 2024

Status

approved