30619

Appears in sequences

• First occurrence of exactly n identical terms in A007448.at n=27A016046
• a(1) = 5; a(n+1) = a(n)-th nonprime, where nonprimes begin at 1.at n=42A025005
• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 29 ones.at n=14A031797
• Number of 2-sided strip polykites with n cells.at n=14A151530
• a(n) = 42*n^2 + 1.at n=27A158604
• E.g.f. satisfies A(x) = sinh(x + A(x)^2/2).at n=6A215094
• Number of n X 2 0,1 arrays indicating 2 X 2 subblocks of some larger (n+1) X 3 binary array having an odd sum, with rows and columns of the latter in lexicographically nondecreasing order.at n=13A227675
• Expansion of Product_{k>=1} ((1 - x^(3*k))/(1 - x^k))^k.at n=19A263346
• Composite numbers k such that k-1 divides 2^k-2.at n=28A330382