603979776

Appears in sequences

• a(n) = 9*4^n.at n=13A002063
• a(n) = 9*2^n.at n=26A005010
• Number of compositions of n into 3*j-1 kinds of j's for all j >= 1.at n=15A055841
• Denominators in partial products of the twin prime constant.at n=7A062271
• Reciprocal of n terminates with an infinite repetition of digit 7. Multiples of 10 are omitted.at n=6A064566
• Expansion of g.f. (1 + 6*x + 5*x^2)/((1-2*x)*(1+2*x)).at n=28A084431
• a(n) = n^2*4^n/4.at n=12A086952
• a(n) = 4^(n-1)*Fibonacci(n).at n=12A099133
• An inverse Catalan transform of J(2n).at n=26A100335
• Triangle, read by rows, of Stirling numbers of second kind, S2(n,k), multiplied by k^k, for n >= 1, 1<=k<=n.at n=43A105197
• Smallest number beginning with 6 and having exactly n prime divisors counted with multiplicity.at n=27A106426
• a(n) = (n^(n+1))*(n + 1)/2 = A000217(n)*A000312(n).at n=8A109391
• Third smallest number with exactly n prime factors.at n=27A116453
• a(n)=4a(n-2). Also 3*A084221.at n=27A137344
• Records in (A063375: Number of divisors of Fibonacci(n)).at n=23A154906
• Expansion of (1-x+4*x^2)/(1-2*x)^2.at n=24A167667
• a(n) = n^9*(n + 1)/2.at n=8A170783
• One quarter the number of nX2 1..4 arrays with no two neighbors of any element equal to each other.at n=13A183354
• a(n) = numerator( n^n/(2*n)! ).at n=24A244083
• Square numbers whose binary reversal is also square.at n=34A272711