31709

Appears in sequences

• a(n) is the number of compositions of n in which the maximal part is 3.at n=18A000100
• Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite EAB = TMA-E (Aiello and Barrer)(1) (Me4N)2Na7[Al9Si27O7] starting with a T1 atom.at n=6A019011
• Indices of primes in sequence defined by A(0) = 27, A(n) = 10*A(n-1) + 17 for n > 0.at n=11A101971
• Triangular array with the first half of the odd-indexed rows of A048004.at n=38A125105
• Positions of harmonic numbers in the EKG sequence.at n=16A140804
• Number of binary strings of length n with no substrings equal to 0010 0100 or 1001.at n=14A164491
• a(n) = 2*a(n-1) + 7*a(n-2) for n > 1; a(0) = 1, a(1) = 13.at n=7A164539