30279

Appears in sequences

• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (0, 1, -1), (0, 1, 1), (1, 0, 1), (1, 1, 1)}.at n=7A151227
• Demi-tribonacci numbers (rounding up): a(0)=a(1)=0, a(2)=2; a(n) = ceiling( (a(n-1)+a(n-2)+a(n-3))/2 ).at n=49A180235
• Monotonic ordering of set S generated by these rules: if x and y are in S then 2xy-x-y is in S, and 3 is in S.at n=16A192525
• Number of nondecreasing sequences of n 1..6 integers with no element dividing the sequence sum.at n=36A212866
• a(1) = a(2) = a(3) = 1; for n > 3, a(n) = ceiling((a(n-1) + a(n-2) + a(n-3))/2).at n=48A258875
• Row sums of A325433.at n=44A325434
• Numbers n such that the arithmetic derivative of A276086(n) is prime.at n=40A328233
• Numbers obtained by reinterpreting base-2 representation of odd numbers in primorial base.at n=47A328462
• Record values of A338565.at n=30A338928
• a(n) = A343046(n, n).at n=33A343047
• Semiprimes of the form k^2 + 3.at n=35A360740