19804

Appears in sequences

• Number of n-step self-avoiding walks on hexagonal lattice from (0,0) to (1,1).at n=8A003291
• a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = (Lucas numbers), t = (1, p(1), p(2), ...).at n=21A024470
• a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = (Lucas numbers), t = (primes).at n=20A024478
• Duplicate of A024478.at n=20A025090
• Centered 23-gonal numbers.at n=41A069174
• Coefficients of a recursive polynomial based on Chaitin's S expressions: a(0)=1; a(1)=x; a(2)=1; a(n)=vector(a(n-1)).reverse(a(n-1)).at n=50A176703
• Total number of parts of multiplicity 8 in all partitions of n.at n=44A222708
• Number of partitions of n^2 into at most 10 square parts.at n=29A255214
• Expansion of (1/x) * Series_Reversion( x*(1-x)/(1+x^5) ).at n=10A366025
• Square array A(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where A(n,k) = n! * k! * [x^n * y^k] 1 / (exp(x) + exp(y) - exp(x+y))^4.at n=39A382736
• Square array A(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where A(n,k) = n! * k! * [x^n * y^k] 1 / (exp(x) + exp(y) - exp(x+y))^4.at n=41A382736