A231990 First differences of Stanley sequence S(0,5) (A187843).

5, 1, 2, 1, 5, 1, 2, 10, 4, 1, 4, 2, 4, 1, 8, 14, 8, 1, 8, 7, 11, 1, 6, 2, 14, 29, 2, 11, 9, 3, 2, 11, 8, 13, 5, 4, 7, 6, 3, 24, 59, 9, 7, 1, 20, 5, 1, 8, 3, 33, 27, 11, 9, 12, 3, 2, 11, 9, 27, 4, 2, 5, 12, 1, 5, 16, 54, 80, 37, 15, 1, 6, 3, 33, 3, 17, 5, 9, 17, 1, 35, 32, 2, 72, 10, 3, 82, 6, 4, 6, 5, 2, 1, 5, 31, 14, 13

Offset: 1

Author

Ralf Stephan, Jan 30 2014

Keywords

• nonn

Comments

For known formulas of differences of other Stanley sequences see A093682.

Links

• Ralf Stephan, Table of n, a(n) for n = 1..999

Crossrefs

Cf. A236269.

Programs

PARI

NAP(sv,N)=local(v,vv,m,k,l,sl,vvl);sl=length(sv);vvl=min(N*N,10^5);v=vector(N);vv=vector(vvl);for(k=1,sl,v[k]=sv[k];for(l=1,k-1,vv[2*v[k]-v[l]]=1));m=v[sl]+1;for(k=sl+1,N,while(m<=vvl&&vv[m],m=m+1);if(m>vvl,return(v));for(l=1,k-1,sl=2*m-v[l];if(sl<=vvl,vv[sl]=1));vv[m]=1;v[k]=m);v
S05(n)=N=1000;NAP([0,5],N)[n]
a(n)=S05(n+1)-S05(n)