66178

Appears in sequences

• Number of n X n symmetric matrices with (0,1) entries and all row sums 2.at n=8A000986
• Sums of rows of A077529.at n=13A077531
• Number of compositions of n such that the least part occurs with odd multiplicity.at n=17A105200
• Kekulé numbers for certain benzenoids of trigonal symmetry.at n=3A110696
• Heptagonal numbers A000566 which are the sum of two other heptagonal numbers > 0.at n=23A133251
• Number of n X n symmetric binary matrices with all row sums 6.at n=2A139673
• Number of 8X8 arrays of squares of integers, symmetric about main diagonal, with all rows summing to n.at n=2A156395
• Number of 17 X 17 arrays of squares of integers, symmetric about the diagonal and under 90 degree rotation, with all rows summing to n.at n=4A156424
• a(n) = n*(n+1)*(6*n-5)/2.at n=28A172082
• T(n,k)=Number of (n*k)Xk binary arrays with nonzero rows in decreasing order, no more than 2 ones in any row and exactly n ones in every column.at n=37A188448
• Numbers which are the sum of two positive cubes and divisible by 29.at n=24A224483
• Expansion of Product_{k>=1} (1 + x^k/(1 + x)).at n=41A307602
• Numbers k such that 427*2^k+1 is prime.at n=37A323114
• Triangle read by rows: T(n,k) is the number of n X n symmetric binary matrices with k ones in every row and column.at n=38A333157
• Triangle read by rows: T(n,k) is the number of n X n symmetric binary matrices with k ones in every row and column.at n=42A333157
• Heptagonal numbers (A000566) with prime indices (A000040).at n=37A346494
• Heptagonal numbers which are products of four distinct primes.at n=9A351867