20264

Appears in sequences

• Convolution of Catalan numbers {1,2,5,14,...} with A002802 (5-fold convoluted central binomial coefficients).at n=5A038836
• Riordan array (1/((1-4*x)*c(x)),x*c(x)/sqrt(1-4*x)), c(x) the g.f. of A000108.at n=39A113955
• Number of partitions of n into parts not congruent to 0, 2, 12, 14, 16, 18, 20, 30 (mod 32).at n=46A115671
• Numbers n such that (A000203(n)+28)/n is an integer.at n=14A162302
• Partitions of 2*n into parts not congruent to 0, +-2, +-12, +-14, 16 (mod 32).at n=23A185083
• Partitions of 2*n + 1 into parts not congruent to 0, +-4, +-6, +-10, 16 (mod 32).at n=22A208851
• Partitions of n into parts not congruent to 0, +-4, +-6, +-10, 16 (mod 32).at n=45A208856
• Alternating sum of 9-gonal (or decagonal) pyramidal numbers.at n=32A269440
• Numbers whose deficiency is a perfect number.at n=19A302125
• Number of chordless cycles in the n-folded cube graph.at n=4A361187
• a(n) = Sum_{k=0..floor(4*n/7)} binomial(k+3,4*n-7*k).at n=27A390039
• Numbers m with deficiency 28: sigma(m) - 2*m = -28.at n=7A392382