112925716859
domain: N
Appears in sequences
- a(n+3) = 3*a(n+2) + 5*a(n+1) + a(n), a(0) = 1, a(1) = 2, a(2) = 11.at n=18A110679
- Indices of centered pentagonal numbers (A005891) that are also triangular numbers (A000217).at n=18A254627
- p-INVERT of the positive integers, where p(S) = 1 - S^2.at n=27A290890
- a(n) = (Fibonacci(3*n-1) + 1)/2 for n >= 1.at n=18A292278
- Expansion of (1 - x + x^2)/((1 - x + x^2)^2 - 4*x^2).at n=27A376716
- Upper (1/2)-midsequence of (F(2n)) and (F(2n+1)), where F=A000045 (Fibonacci numbers); see Comments.at n=27A387779