78642

Appears in sequences

• Sequence b_4 (n) arising from homology of partitions with even number of blocks.at n=4A003994
• Split positive integers into extending even groups and sum: 1+2, 3+4+5+6, 7+8+9+10+11+12, 13+14+15+16+17+18+19+20, ...at n=34A061317
• a(n) = n*Fibonacci(n) * Sum_{d|n} 1/(d*Fibonacci(d)).at n=17A203319
• Number whose binary expansion encodes via runlengths the partition that is at the top of the main trunk of Bulgarian solitaire game tree drawn for the deck with n(n+1)/2 cards.at n=9A227451
• Expansion of Product_{k>=1} (1 + x^prime(k))^prime(k).at n=36A291647
• a(n) = 4*a(n-1) - 6*a(n-2) + 4*a(n-3) - a(n-4) + a(n-5) with a(1) = 1, a(2) = 2, a(3) = 4, a(4) = 8, and a(5) = 15.at n=18A385107