18114

Appears in sequences

• Numbers k such that 4*10^k + 7*R_k is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=14A056708
• Number of partitions of n such that (number parts having multiplicity 1) is not a part and (number of 1s) is not a part.at n=44A241509
• Number of n X 6 0..1 arrays with the number of 1's horizontally, diagonally or antidiagonally adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.at n=2A284332
• T(n,k) = Number of n X k 0..1 arrays with the number of 1's horizontally, diagonally or antidiagonally adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.at n=30A284334
• Number of 3 X n 0..1 arrays with the number of 1's horizontally, diagonally or antidiagonally adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.at n=5A284336
• Number of periodic multisets of compositions of total weight n.at n=23A303552