37378

Appears in sequences

• Semi-meanders: number of ways a semi-infinite directed curve can cross a straight line n times.at n=12A000682
• Number of rotationally symmetric closed meanders of length 4n+2.at n=6A060206
• Numbers k such that 7*10^k + 4*R_k + 5 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=11A103059
• Sum of n and partition number of n.at n=40A133041
• Numbers a(n) for which there exists k>1 such that the number of partitions of a(n) into k parts is k.at n=39A209122
• Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n-1) + 1, where a(0) = 1, a(1) = 3, b(0) = 2, b(1) = 4.at n=18A293406
• Irregular triangle read by rows: for n >= 2, 2 <= k <= floor(n/2) + 1, T(n,k) = the number of semi-meanders with n top arches, a first arch of length one and k arch groupings.at n=49A339179
• Irregular triangle read by rows: for n >= 2, 2 <= k <= floor(n/2) + 1, T(n,k) = the number of semi-meanders with n top arches, a first arch of length one and k arch groupings.at n=50A339179