26226

Appears in sequences

• Number of centered 3-valent (or boron, or binary) trees with n nodes.at n=20A000675
• Values of m such that N=(am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,13.at n=12A064243
• Numbers with at least 2 distinct digits and whose "rotations" (including the number itself) are multiples of these digits; repeated digits allowed but digit 0 not allowed.at n=21A066484
• Third partial sums of fifth powers (A000584).at n=5A101099
• Coefficients of a generalized Jaco-Lucas polynomial (even indices) read by rows.at n=50A122076
• a(n) = 1458*n - 18.at n=17A157508
• a(n) = 81n^2 - n.at n=17A157953
• a(n) = 324n^2 - 2n.at n=8A158305
• a(n) = 324*n^2 - 18.at n=8A158589
• a(n) = 15*2^n + 6*4^n + 10*3^n + 3*5^n + 6^n + 21.at n=5A254463
• Numbers n with digits 2 and 6 only.at n=39A284632
• Number of n X 3 0..1 arrays with the number of 1's horizontally, antidiagonally or vertically adjacent to some 0 one less than the number of 0's adjacent to some 1.at n=5A285025
• Number of n X 6 0..1 arrays with the number of 1's horizontally, antidiagonally or vertically adjacent to some 0 one less than the number of 0's adjacent to some 1.at n=2A285028
• T(n,k) = Number of n X k 0..1 arrays with the number of 1's horizontally, antidiagonally or vertically adjacent to some 0 one less than the number of 0's adjacent to some 1.at n=30A285030
• T(n,k) = Number of n X k 0..1 arrays with the number of 1's horizontally, antidiagonally or vertically adjacent to some 0 one less than the number of 0's adjacent to some 1.at n=33A285030
• Expansion of Product_{k>=1} (1 + x^k/(1 + x)).at n=37A307602
• Number of partitions of positive integer n such that all parts are less than the square root of n.at n=53A316353
• Expansion of (1/x) * Series_Reversion( x*(1-x)^3/(1-x+x^3) ).at n=7A366052