30120

Appears in sequences

• a(0) = 1, a(n) = 22*n^2 + 2 for n>0.at n=37A010012
• a(n) is the concatenation of n and 4n.at n=29A019552
• a(n) = T(n,n+2), T given by A027052.at n=15A027053
• Starting from generation 8 add previous and next term yielding generation 9.at n=29A048455
• Number of asymmetric mobiles (circular rooted trees) with n nodes and 3 leaves.at n=32A055364
• Sum of all matrix elements M(i,j) = (i*j)/(i+j) multiplied by (2*n)!/n!.at n=4A098607
• a(n) = 24*p(n) = 24*A000041(n).at n=23A183008
• Govindarajan's triangle F^{box 2} arising in enumeration of multi-dimensional partitions, read by rows.at n=62A216809
• E.g.f.: A(x) = x + sin(A(x)^2).at n=5A226758
• Sum of all parts of all partitions of n that contain 1 as a part.at n=23A228816
• a(n)/2^n is the expected value of the maximum of the number of heads and the number of tails when n fair coins are tossed.at n=12A230137
• "Inside numbers". Pick a term "t" and one of its digits "d". Now jump to the right over d digits if "d" is odd, and to the left over d digits if "d" is even. Whatever the "d" you choose, you will stay on "t".at n=27A284515
• Wiener index of the n X n white bishop graph.at n=17A292059
• Numbers k such that A276086(k)-1 or A276086(k)+1 is a perfect power (A001597), where A276086 is the primorial base exp-function.at n=33A379960
• Numbers k such that A276086(k)+1 is a perfect power (A001597), where A276086 is the primorial base exp-function.at n=19A379962